I tried doing a T2 run on the Diamond Pawn gate, and when I went down from Moorcroft, the loading screen got to ~40% before becoming extremely slow. Like 1% per ~5 seconds. Eventually it loaded, but it never reached 100%, and the level didn't load correctly:

It looked like this: http://img.photobucket.com/albums/v95/Zerus/003.png

I've had this occur on both of Depth 9's levels. There were also issues with elevation in areas with different altitudes.

It was working fine when I logged out about an hour ago. I didn't delete any files or change anything during that time.

Well, restarting my computer seems to have fixed the issue. I've never had anything like that occur before, though...